# 小海龟

"""
三个命令：
    运动命令: forward()
    画笔命令
    done() 继续执行
"""

import turtle
import math

turtle.forward(100)
turtle.right(45)
turtle.forward(100)
turtle.circle(50)
turtle.right(90)
turtle.forward(100)
turtle.right(45)
turtle.forward(100)
turtle.right(90)
turtle.forward(100 * math.sqrt(2))
turtle.right(90)
turtle.done()
